misassumption

Definition of misassumption

: something that is incorrectly assumed to be granted or true : a mistaken assumptionI shudder to think of how much margarine I ate growing up on the misassumption that it was somehow healthier.— Richard T. Bosshardt

Other Words from misassumption

misassume\ˌmis-​ə-​ˈsüm\transitive verbmisassumed; misassuming

… a lot of boys get shunted into programs that misassume what they can and can't do … — Richard Whitmire